Ln3Q9 as a Molecular Framework for Ion‐Size‐Driven Assembly of Heterolanthanide (Nd, Er, Yb) Multiple Near‐Infrared Emitters. Issue 10 (4th December 2014)

• Record Type: Journal Article
• Authors: Artizzu, Flavia; Quochi, Francesco; Marchiò, Luciano; Correia, Raquel Fonseca; Saba, Michele; Serpe, Angela; Mura, Andrea; Mercuri, Maria Laura; Bongiovanni, Giovanni; Deplano, Paola
• Is Part Of: Chemistry. Volume 21:Issue 10(2015)
• Page Start: 3882
• Page End: 3885
• Publication Date: 2014-12-04
• Subjects: heterometallic complexes -- lanthanides -- luminescence -- multifunctional materials -- strucure elucidation; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201405634
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: A unique example of discrete molecular entity Nd y Er x Yb3−( x + y ) Q9 (1 ) (Q=quinolinolato) containing three different lanthanides simultaneously emitting in three different spectral regions in the NIR, ranging from 900 to 1600 nm, has been synthesized and fully chararacterized. A simple molecular strategy based on tuning metal composition in the Ln3 Q9 framework, which contains inequivalent central and terminal coordination sites, has allowed a satisfactory ion‐size‐driven control of molecular speciation close to 90 %. In1 the central position of the larger Nd ion is well distinguished from the terminal ones of the smaller Yb 3+ and Er 3+, which are almost "vicariants" as found in the heterobimetallic Er x Yb3− x Q9 (2 ). The Ln3 Q9 molecular architecture, which allows communication between the ions, has proved to afford multiple NIR emission in1 and2, and is promising to develop a variety of multifunctional materials through the variation of the Ln composition. Abstract : Size matters : Relevant ion‐size effects allow the control of metal composition in heterolanthanide quinolinolates. A unique example of heterotrimetallic Nd‐Er‐Yb complex with multiple NIR emission is reported (see figure).